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Suppose two balls (Masses M and m) are suspended vertically at the
same elevation.
Suppose this happens in a room without air, in a stable and rigid
building, and that M>>m.
Suppose the ball M is pushed suddenly toward the ball m (along the
line connecting the two centers of mass).
I predict that m will also be disturbed, practically at the same time
and along the same direction.
Cavendish, who measured the gravitational constant G, would probably
agree with my prediction.
1) What is wrong with saying that propagations of disturbances of
this kind are examples of gravitational waves?
Yes, I know that the term "gravitational wave" is already used for
something completely different